Patent US4443060A successfully refreshed from Google Patents.
US4443060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Run-free color raster for multi-color printing
Assignee: Heidelberger Druckmaschinen AG
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Filing: 1982-01-21
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Granted: 1984-04-17
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Expires: 2002-01-21
Abstract
Abstract In engraving of printing forms particularly of gravure cylinders, it has previously been possible to produce run-free color raster configurations for only two colors. The present invention discloses rastering methods for run-free color production of four color impressions and polychromatic impressions.
Inventors
- 👤 Eggert Jung
- 👤 Heinrich Wadle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:11
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
A plurality of color screens for multi-color reproduction with a printing machine wherein the raster positions of a first one of said color screens for a first color are spaced a distance M apart in an axial first direction and are spaced a distance M apart in a second direction transverse to the axial direction, the raster positions of a second one of said color screens for a second color are spaced a distance two-third M apart in said first direction and are spaced a distance M apart in said second direction, the raster positions of a third one of said color screens for a third color are spaced a distance M apart in said first direction and are spaced a distance two-thirds M apart in said second direction, and wherein the raster positions of a fourth one of said color screens for a fourth color are spaced a distance one-half M apart in said second direction.
Claim 2
Dependent Claim
157 words
A plurality of color screens for multi-color reproduction with a printing machine wherein the raster positions of a first one of said color screens for a first color are spaced a distance M apart in an axial first direction and are spaced a distance M apart in a second direction transverse to the axial direction, the raster positions of a second one of said color screens for a second color are spaced a distance two-third M apart in said first direction and are spaced a distance M apart in said second direction, the raster positions of a third one of said color screens for a third color are spaced a distance M apart in said first direction and are spaced a distance two-thirds M apart in said second direction, and wherein the raster positions of a fourth one of said color screens for a fourth color are spaced a distance one-half M apart in said second direction.
Claim 3
Dependent Claim
29 words
A plurality of color screens according to claim 1 wherein the raster positions of the fourth color screen are spaced a distance one-half M apart in said first direction.
Claim 4
Dependent Claim
29 words
A plurality of color screens according to claim 1 wherein the raster positions of the fourth color screen are spaced a distance two-thirds M apart in said first direction.
References Cited (Backward Citations)
DE1112407B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |